Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files. All computation runs locally in your browser.

What is a Hash Function?

A cryptographic hash function takes an input (text, file, or any data) and produces a fixed-size string of characters called a hash or digest. The same input always produces the same hash, but even a tiny change to the input produces a completely different hash. Hash functions are one-way — you cannot reverse a hash back to the original input.

This tool generates hashes using industry-standard algorithms including MD5, SHA-1, SHA-256, and SHA-512. It uses the Web Crypto API built into your browser for fast, secure hashing.

How to Use This Hash Generator

Enter text or upload a file — Type or paste the text you want to hash, or drag and drop a file.

Select an algorithm — Choose from MD5, SHA-1, SHA-256, or SHA-512 depending on your needs.

View the hash — The hash is generated instantly as you type or after uploading a file.

Copy the result — Use the copy button to copy the hash output to your clipboard.

Common Use Cases

Verifying file integrity — Compare hash values of downloaded files against published checksums to ensure files haven't been tampered with or corrupted.

Generating checksums — Create SHA-256 hashes for software releases, configuration files, or data exports to verify integrity later.

API signature verification — Many webhook and API integrations use HMAC or hash-based signatures for request authentication.

Data deduplication — Use hashes to quickly identify duplicate files or content without comparing the full data.

Frequently Asked Questions

What is a hash function?

A hash function takes an input of any size and produces a fixed-size string of characters (the hash). The same input always produces the same hash, but even a tiny change in the input produces a completely different hash. Hash functions are used for data integrity verification, password storage, and digital signatures.

Which hash algorithm should I use?

For security purposes, use SHA-256 or SHA-512. MD5 and SHA-1 are considered cryptographically broken and should only be used for non-security purposes like checksums. SHA-256 offers a good balance of security and performance for most applications.

Can I hash a file online?

Yes. Drag and drop a file or click to select one. The file is hashed entirely in your browser using the Web Crypto API — it is never uploaded to any server. This makes it safe to hash sensitive files.